"Steve" wrote in message
...
Christian McArdle wrote:
Use TJI "I" beams, not solid timber joists as no shrinking, are
perfectly straight and are very light.


How thick would a TJI "I" beam joist be to span exactly 4m with a
standard
domestic loading?

I have my doubts that a TJI joist can
be loaded by point loads mid-web.

No one mentioned supporting mid-web.



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